Henry l



(No Model.) H. L. MORRELL.

SAW FRAME.

No. 579,492. Patented Mar. 23, 1897.

llnirnn TATFS HENRY L. MORRELL, OF BROOKLYN, NEW YORK, ASSIGNOR, BYMESNE ASSIGNMENTS, TO THE SPIRAL TOOL AND MACHINE COMPANY.

SAW-FRAM E.

SPECIFICATION forming part of Letters Patent No. 579,492, dated March23, 1897..

Application filed October 20, 1396, Serial No. 609,399. (No model.)

To all whom it may concern.-

Be it known that I, HENRY L. MORRELL, a citizen of the United States,and a resident of Brooklyn, in the county of Kings and State of NewYork,have-invented certain new and useful Improvements in Saw-Frames, ofwhich the following is a specification.

My invention relates to improvements in saw-frames, having for itsobject new and useful means for tightening the saw within the frame. Itis adapted to use in connection with various kinds of saws and theirframes. In the drawings hereof I illustrate it as applied to a butcherssaw, since its use is especially applicable thereto.

In the drawings, Figure 1 illustrates a sidewise elevation of the sawembodying the invention. Fig. 2 illustrates a detail of the constructionof the operative parts at or near the handle of the saw. Fig. 3illustrates an edgewise view of the rear end of the frame. Fig. 4.illustrates a side View of the f ulcrum-plate. Fig. 5 illustrates anedgewise view of the fulcrum-plate. Fig. 6 illustrates an elevation ofthe screw and threaded spindle employed to tighten the saw.

A is the handle of the saw. B is the frame thereof.

O is the portion of the frame which is con nected to the handle and isattached thereto by the ordinary rivets D D.

E is the stretching-lever. It is pivoted at F to a thin metallic plateG, preferablya piece of saw-blade, which is fastened within a slot orrecess H in the rear edge of the part 0 of the saw-frame. The plate Grisfastened within the said slot by a cross-pin I, or it may be brazed orotherwise held.

J is a spindle or pin which may be fixed in the saw-frame O and issurrounded bya spring K, which abuts at one end against the sawframe andat the other end against the end of the lever E, so that the lever isnormally thrown forwardly at its operative end.

The part 0 of the frame and the upper part of the lever E are both ofthe same thickness, or substantially so, and are both adapted to enterthe saw-kerf in the front edge of the handle, as usual, and the spring Kis preferably of not greater width than said saw-kerf,

so that all these parts may be received within, secreted from sight, andprotected by the sides of the wooden handle, between which they areembraced when in place.

L is a threaded spindle to which is attached a nut M. One end of thisspindle rests in a recess N in the saw-frame O, and the other end passesthrough a threaded opening made in the lever E, so that when the nut Mis turned the lower end of the lever will be crowded rearwardly. The nutand spindle engage with the lever E below the wooden part of the handle.

0 is the saw, which is fastened at its forward end to thedownwardly-projecting extremity of the frame B by a pin P in the usualmanner, and at the opposite end is attached by a similar pin P to thelower end of the lever E. The threaded thumb-nut is milled upon itsexposed edge, which projects laterally beyond the lever E and portionof'the frame 0, and is preferably provided with holes Q, in which a nailor equivalent device may be thrust to aid in turning it if it be toostiff to turn with the fingers alone.

The lower end B of the part O of the frame has a slit S in it ofsufficient size to receive the saw, and the saw passes through that slitand is sustained by its sides.

The operation of the apparatus is as follows: WVhen no saw is in theframe, the spring K on the spindle J normally throws the lower end ofthe lever E forwardly, so that the saw can be easily inserted. It ispreferably fastened at the forward end of the frame by the pin P first,and then, having been set into the slit S, is properly engaged with thelower end of the lever E by the pin P. Thereupon, in order to stretchthe saw, the thumb-nut M, and consequently the spindle L, are revolved,which presses the lever E rearwardly, thus tightly stretching the saw.Any desired tension may be applied to it by increasing the rearwardmovement of the thumb-nut, and if the strain is too great to permit ofthe not being turned by the fingers, then a nail or equivalent devicemay be inserted in the holes Q in it, and with this aid the saw may begiven any desired tension or stifiness and it will be particularlynoticed that the upper part of the lever E and the spring K and spindleon which it moves are all protected from injury by being inclosed withinthe handle of the same, and are also secreted from view, so that thetool presents a much better appearance. This feature is of considerableconsequence in a butchers saw, because fat and other adhesive materialcatch and lodge in all uneven surfaces of butchers saws and occasionmuch trouble in cleansing the same, which has to be done daily in orderto keep the tool sweet and fit for use.

It will be seen by those who are familiar with this art thatmodifications in the construction of the parts will be desirable whenthe invention is applied to saws other than butchers saws, but suchmodifications will be obvious. I therefore do not limit myself to thedetails of construction described and shown.

I claim The combination of a saw-frame, a portion of which is attachedto the handle and is at substantially right angles to the back of theframe, a lever located within the handle and pivoted to the portion ofthe frame, which is attached to the handle, a thumb-nut and threadedspindle interposed between said portion of the frame, and the lever ator near its end, and a slit or opening in the lower end of the saw-framethrough which the saw passes when attached to said lever, for thepurposes set forth.

Signed at Brooklyn, in the county of Kings and State of New York, this17th day of October, A. D. 1896.

HENRY L. MORRELL.

Witnesses:

JOHN M. E. MORRILL, .WM. J. BROWN.

